Spindle adapted for textile machinery

ABSTRACT

A spindle, particularly adapted for use in textile machinery, with a spindle bushing containing a shaft mounted in a pair of bearings disposed in a holder. On the circumference or at least on a part of the circumference of the spindle bushing there is located a groove in which a split circular or segmental elastic adjusting element is mounted, the adjusting element being held down from above by a thrust screw screwed into the spindle bushing holder.

United States Patent 1 Hosndl et al.

[ 1 May 22, 1973 [54] SPINDLE ADAPTED FOR TEXTILE MACHINERY [75]Inventors: Vaclav Hosne'dl; lden k Rajsigl; Jii Rathuskf; MiroslavProkopec, all of Brno; Milo s Mlaidek, Usti nad Orlici, all ofCzechoslovakia [73] Assignee: Zvl Vyzkumny ustav pro Valiva loziska,Brno, Czechoslovakia 22 Filed: Jan. 7, 1972 211 Appl. No.: 216,020

[52] US. Cl. ..308/189 R [51] Int. Cl. ..F16c 35/04 [58] Field of Search..308/l89, 207

[56] References Cited UNITED STATES PATENTS 1,700,837 2/1929 Fisher..308/l89 R Primary Examiner-Charles J. Myhre Assistant Examiner-FrankSusko Attorney-Arthur O. Klein [57] ABSTRACT A spindle, particularlyadapted for use in textile machinery, with a spindle bushing containinga shaft mounted in a pair of bearings disposed in a holder. On thecircumference or at least on a part of the circumference of the spindlebushing there is located a groove in which a split circular or segmentalelastic adjusting element is mounted, the adjusting element being helddown from above by a thrust screw screwed into the spindle bushingholder.

6 Claims, 3 Drawing Figures This invention relates to a high-speedspindle applicable particularly in textile machinery.

In its working position the textile spindle, which rotates in a bushing,is locked in a fixed axial position; it is necessary to prevent thebushing from rotary motion or from motion in a radial direction. Inorder to provide for repeated dismantling of the spindle during itswhole service life, particularly during cleaning of the workingelements, in the prior art a push fit for the spindle within the textilemachinery has been selected, turning of the spindle being prevented bythe pressure of a simple thrust screw engaging the spindle body fromwithout. The correct function of the spindle as well as its guaranteedservice life has been reduced by said method of its positioning in anuncontrollable mode resulting from deformation of the bushing caused bythe pressure of said thrust screw. In addition to reduced service life,the noise of the assembly increases; this contributes to much worseworking conditions, especially within textile machinery with a greatnumber of stations having spindles.

According to the present invention, the serious abovementioned drawbacksare eliminated. There is provided a spindle, particularly for textilemachinery, with a spindle bushing containing a shaft mounted in a pairof bearings. On the circumference or at least on part of thecircumference of the spindle bushing there is located a groove in whichthere is mounted a split circular or segmental elastic adjustingelement, such element being held down from above by a thrust screwscrewed into the holder of the spindle bushing. The side walls of themounted adjusting element are provided with recesses alternating withopposite projections, or the adjusting element is similarly adapted forthe clearance elimination in the groove. The inner or rest face of thethrust screw is provided with a sharp point. In the circumference of thespindle bushing, or alternatively, in the bore of the holder of thisbushing, there is provided a second groove in which an elastic ring ismounted.

Several examples of the spindle application according to the inventionare shown on the attached drawings.

FIG. 1a is a fragmentary radial section of the spindle in front view,the view showing the mounted adjusting element;

FIG. 1b is a detail view in elevation of a part of this adjustingelement; and

FIG. 2 is a view similar to FIG. 1 of a spindle provided with a secondgroove for the elastic ring.

The first illustrative embodiment of the spindle, as shown in FIG. 10,includes a spindle bushing 1 with race-ways 1a for a ball bearingassembly 1b, wherein a shaft 1c is mounted. The spindle bushing I,mounted for axial adjustment in the bore of a holder 2, is provided witha suitably shaped circumferential groove 3 in which an elastic adjustingelement 3a is located, such element usually being a split ring made ofplastic or any other resilient material. The mounting of the spindlebushing 1 within the holder is secured by a thrust screw 4 provided onits inner end with a sharp point 5. By tightening the thrust screw 4,the point 5 will penetrate with minimum radial force into the adjustingelement 3a, thus retaining it in a desired adjusted position along theaxis of spindle shaft 1c. The radially acting force will not cause anydeformation of the raceways 1a within the spindle bushing I. The groove3 which can have either a flat, concave or otherwise shaped bottom, runsalong the whole circumference of the bushing I or along a part thereof.

The adjusting element 3a, shown in detail in FIG. 1b, is split orotherwise adapted for mounting in groove 3. For the reason ofelimination of axial clearance, element 3a is suitably shaped and madeof a reasonably resilient material. The side walls of the adjustingelement 3a, as indicated on the detail in FIG. 1b, are provided withrecesses 7 alternating with opposite projections 8, permitting anelastic deflection of the element and thus the elimination of axialclearance of the adjusting element 3a in groove 3 of the bushing l.

The spindle in FIG. 2 is designed in the same way as the one describedabove and has the parts thereof designated by the same referencecharacters. It is, however, provided with a ring 6a made of a resilientmaterial, which is located in a second groove 6 in holder 2 adjoininggroove 3 for the adjusting element 3a. This elastic ring 6a iscompressively engaged by holder 2 and secures the spindle within theholder against rotary motion and vibrations. At the same time, itfacilitates the correct adjustment of the spindle during its assembly byfrictionally retarding axial adjustment of the bushing relative to theholder.

The invention is illustrated and described with a reference to aplurality of preferred embodiments thereof and it is to be understoodthat it is in no way limited to said plurality of embodiments but iscapable of numerous modifications according to the appended claims.

What is claimed is:

1. A spindle adapted for use in textile machinery, comprising a holder,a spindle bushing mounted in a bore in the holder and adjustable axiallythereof, a shaft mounted in a bearing in the bushing, a circumferentialexternal groove on at least part of the spindle bushing, an elongatedelastic adjusting element mounted in said groove, and a thrust screwscrewed into the holder of the spindle bushing and having its inner endcompressively engaging the elastic adjusting element.

2. A spindle according to claim 1, wherein the side walls of the mountedadjusting element compressively engage the opposite side walls of thegroove.

3. A spindle according to claim 1, wherein the groove extends completelyaround the bushing, and the elastic adjusting element is in the form ofa split circle.

4. A spindle according to claim 1, wherein the side walls of the mountedadjusting element are provided with recesses alternating with oppositeprojections, said projections compressively engaging the opposite sidewalls of the groove.

5. A spindle according to claim 1, wherein the inner face of the thrustscrew is provided with a sharp point which digs into the elasticadjusting element.

6. A spindle according to claim 1, wherein there is a second groove onthe circumference of the spindle bushing or in the bore of the holder ofthe bushing, a second elastic ring being mounted in said second grooveand compressively engaging the part which it confronts and frictionallyretarding axial adjustment of the bushing relative to the holder.

1. A spindle adapted for use in textile machinery, comprising a holder,a spindle bushing mounted in a bore in the holder and adjustable axiallythereof, a shaft mounted in a bearing in the bushing, a circumferentialexternal groove on at least part of the spindle bushing, an elongatedelastic adjusting element mounted in said groove, and a thrust screwscrewed into the holder of the spindle bushing and having its inner endcompressively engaging the elastic adjusting element.
 2. A spindleaccording to claim 1, wherein the side walls of the mounted adjustingelement compressively engage the opposite side walls of the groove.
 3. Aspindle according to claim 1, wherein the groove extends completelyaround the bushing, and the elastic adjusting element is in the form ofa split circle.
 4. A spindle according to claim 1, wherein the sidewalls of the mounted adjusting element are provided with recessesalternating with opposite projections, said projections compressivelyengaging the opposite side walls of the groove.
 5. A spindle accordingto claim 1, wherein the inner face of the thrust screw is provided witha sharp point which digs into the elastic adjusting element.
 6. Aspindle according to claim 1, wherein there is a second groove on thecircumference of the spindle bushing or in the bore of the holder of thebushing, a second elastic ring being mounted in said second groove andcompressively engaging the part which it confronts and frictionallyretarding axial adjustment of the bushing relative to the holder.